From what I've heard, huey pilots had severe promblems with Low G, by hugging terrain during vietnam.
You don't need to raise the collective to climb, if you have some airspeed to spare, so theoretically you could have some power to spare.
What would your toque guage show if you're in a 'disc unloaded' situation? Would it drop? With the disc unloaded, surely the power required to fly is nil?
Or is it?